Rear Window Defogger System does not Operate: Procedure

1. Turn the window defogger switch on.
2. Check that the operation sound of the DEF relay is heard.

   OK

   Relay operating sound is heard.

NG → See step   5 

OK: Go to next step 

1. Disconnect the P6 rear window defogger wire and 2F instrument panel junction block connectors.
   Fig 1: Identifying P6 Rear Window Defogger Wire And 2F Instrument Panel Junction Block Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P6-1 - 2F-2	Always	Below 1 Ω
   P6-1 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the 2F instrument panel junction block connector.
   Fig 2: Identifying P6 Rear Window Defogger Wire Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   P6-1 - Body ground	Ignition switch ON	11 to 14 V

NG → See step   12 

OK: Go to next step 

1. Disconnect the P7 rear window defogger wire connector.
   Fig 3: Identifying P7 Rear Window Defogger Wire Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P7-1 - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPAIR OR REPLACE REAR WINDOW DEFOGGER WIRE 

1. Remove the ECU-IG NO. 2 and HTR-IG fuses from the instrument panel junction block.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   ECU-IG NO. 2 fuse	Always	Below 1 Ω
   HTR-IG fuse	Always	Below 1 Ω

NG → REPLACE FUSES (ECU-IG NO. 2, HTR-IG) 

OK: Go to next step 

1. Disconnect the 2F instrument panel junction block connector.
   Fig 4: Identifying 2F Instrument Panel Junction Block Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   2F-3 - Body ground	Ignition switch ON	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the 2F instrument panel junction block connector.
   Fig 5: Identifying 2G Instrument Panel Junction Block Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the 2G instrument panel junction block connector.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   2G-1 - Body ground	Always	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the E75 heater control (blower switch) connector.
   Fig 6: Checking Harness And Connector (Rear Window Defogger Switch - Instrument Panel J/B)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the 2Q instrument panel junction block connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E75-2 (RDEF) - 2Q-12	Always	Below 1 Ω
   E75-3 (IG+) - 2Q-10	Always	Below 1 Ω
   E75-2 (RDEF) - Body ground	Always	10 kΩ or higher
   E75-3 (IG+) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the 2G and 2Q instrument panel junction block connectors.
   Fig 7: Checking E75 Heater Control (Blower Switch) Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   E75-2 (RDEF) - Body ground	Ignition switch ON	11 to 14 V
   E75-3 (IG+) - Body ground	Ignition switch ON	11 to 14 V

NG → See step   12 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 8: Checking E75 Heater Control (Blower Switch) Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E75-5 (E) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   11